An experimental and analytical study on dynamic behaviors of high-precision mechanism including revolute clearance joints

In order to improve the accuracy of high-precision mechanism with revolute clearance joints, an experimental and analytical method is proposed for investigating the actual dynamic response in this paper. With contact-impact and friction effects taken into account, the continuous contact force model and modified Coulomb's friction model are employed to describe the contact characteristics between journal and bearing. Then, the experimental test rig is established for performing the dynamic performance tests of high-precision mechanism with different working conditions. Moreover, the stability analysis and energy analysis of high-precision mechanism are conducted. And, the mathematical statistics parameters are applied to represent the mapping relationship between operational parameters and dynamic behavior of high-precision mechanism. The valuable conclusions could be an advantage to decrease the vibration, wear and energy consumption.

Automated summary

This paper proposes an experimental and analytical method to investigate the actual dynamic response of high-precision mechanisms with revolute clearance joints. By considering contact-impact and friction effects, a continuous contact force model and modified Coulomb's friction model are used to describe the contact characteristics between the journal and bearing. A test rig is established to perform dynamic performance tests under different working conditions. Stability analysis, energy analysis, and mathematical statistics parameters are applied to represent the mapping relationship between operational parameters and dynamic behavior. The valuable conclusions can be utilized to reduce vibration, wear, and energy consumption.